Established Level Methodology

The calculation is based on the "Established Level" portion of Bill James Favorite Toy.
- The metric from the current year (2018) is multiplied by 3.
- The previous year's (2017) metric is multiplied by 2.
- The metric from two years prior (2016) is added to the above totals and they are divided by 6.
- One caveat is that the final "Established Level" should not be below 75% of the current year's (2018) metric

Example:

Player X has 5.0 WAR in 2018, 7.0 WAR in 2017, and 4.0 WAR in 2016.
((5.0 x 3) + (7.0 x 2) + 4.0) / 6 = 5.5 WAR